Lap carrier resiliently compressible in axial direction



Sept. 9, 1969 5,11 ,355 ETAL 3,465,984

LAP CARRIER RESILIENTLY COMPRESSIBLE IN AXIAL DIRECTION Filed Nov. 8,1967 4 Sheets-Sheet 1 INVENTORS Sept. 9, 1969 TIGGES ETAL 3,465,984

LAP CARRIER RESILIEN'I'LY COMPRESSIBLE IN AXIAL DIRECTION Filed Nov. 8,1967 4 Sheets-Sheet 2 INXENTOR. '7 W 44hr} Sept. 9, 1969 a. TIGGES ETAL3,465,984

LAP CARRIER RESILIENTLY COMPRESSIBLE IN AXIAL DIRECTION Filed Nov. 8,1967 4 Sheets-Sheet 1w q I 1 ii i Sept. 9, 1969 115 55 ETAL 3,465,984

LAP CARRIER RESILIENTLY COMPRESSIBLE IN AXIAL DIRECTION Filed NOV. 8,1967 4 Sheets-Sheet 4 INVENTOR.

United States Patent 3,465,984 LAP CARRIER RESILIENTLY COMPRESSIBLE 1NAXIAL DIRECTION Gerhard Tigges, Kohlfurther Brucke 29, Wuppertal-Cronenberg, Germany, and Walter Henning, 5113 B210- mann-Lonssh 1,Hoengen, Germany Filed Nov. 8, 1967, Ser. No. 681,500 Claims priority,application Germany, Nov. 10, 1966, T 32,492; Sept. 6, 1967, T 34,726Int. Cl. B6511 75/20 U.S. Cl. 242-11311 11 Claims ABSTRACT OF THEDISCLOSURE A lap carrier resiliently compressible in axial direction anddefining a surface area, which comprises end rings and at least oneintermediate ring. A plurality of carrier elements is disposed betweenthe end rings and has outer edges. The outer edges are oriented towardthe surface area of the lap carrier. The carrier elements compriseelastically bendable stays equally distributed along the periphery ofthe lap carrier and are inclined for at least a part of their length tothe longitudinal axis of the lap carrier, and the stays are rigidlysecured to the rings.

The present invention relates to a lap carrier resiliently compressiblein axial direction, in general, and to such lap carrier having a surfacearea of cylindrical or truncated cone shape and carrier elementsdisposed between end rings at the end sides and aligned with their outeredges to the mentioned surface area, in particular.

Lap carriers resiliently compressible in axial direction are known,preferably for the wet treatment of yarn cops, for instance for dyingthe same. A known structure uses a helical spring, the windings of whichproject through flat, uncovered or covered chain-like members, whichform the cylindrical surface area. The production of such lap carriersis extremely complicated. It must be performed practically completelymanually, particularly in order to obtain the threading of the windingturns of the helical spring through the chain-like members. Thecorresponding lap carriers are therefore extremely expensive. They arealso very much subject to destruction.

In order to bring about a simpler structure, lap carriers are knownwhich are resiliently compressible in axial direction and which comprisetwo equal parts, each consisting of an end ring and rods disposedparallel to the axis of the spool and rigidly inserted at equaldistances in the end ring. The rods of the parts which enter in adirection towards each ohter and between each other are displaceablyguided in guide openings of a center ring, whereby a helical spring isdisposed inside of the rods, which helical spring exerts pressure on theend rings and pushes the latter outwardly. These lap carriers have notbeen accepted by the trade. Aside from a likewise comparativelyexpensive production, they have the drawback, that the two lap carrierparts do not form a common cylindrical surface area. The rods of onepart are disposed rather on one cylindrical area with a larger radiusthan the rods of the other part. If the yarn lap carrier sits in theaxial bore of a yarn spool, and if it is then pushed together, the endsof the carrier rods disposed on the outer cylindrical surface areadamage and vary, respectively, easily the inner yarn layers.

In order to avoid this drawback, finally lap carriers resilientlycompressible in axial direction are known, the casing of which is formedby two coaxially disposed cages, which are displaceable towards eachother by the tension of a spring, and each of the cages compriseslongitudinal carrier elements, which jointly define a cylinder and aresecured with one end to one end ring, whereby the carrier elements atthe other end have a passage for a holding ring, which projectsalternately through the passages of one cage and those of the other cageand thus connects together the two cages. These lap carriers have theadvantage, inherent in its use, that both lap carrier cages are disposedpractically on one single cylindrical surface area; they have, however,again the drawback of an extremely complicated production and thedrawback, that no sufficient buckling stability in axial direction ispresent. In case of a buckling in axial direction the drawback occurs,that the ends of the hair-needle shaped bent wire-carrier elementsproject piercingly from the cylindrical casing. This leads again to thedanger of damage of the yarn winding layers.

It is one object of the present invention to provide a lap carrierresiliently compressible in axial direction, wherein by a simplest andpossibly integrally produced structure a high buckling stability inaxial direction is brought about, in spite of the possibility of easierand greater axial compression than possible in the known structures.

It is another object of the present invention to provide a lap carrierresiliently compressible in axial direction which comprises carrierelements formed of stays which are elastically bent through andextending for at least one part of its length inclined to thelongitudinal axis of the lap carrier, as well as sitting rigidly on therings and equally divided over the periphery of the lap carrier.

By this arrangement an extremely simplified structure of a lap carrierof this type is created. By example, in case of production by means ofan injection-molding process of synthetic material an integral structurecan be obtained, which does not require any finishing work. The lapcarriers can be manufactured at such favorable costs, that they can beused as disposable lap carriers. This brings about first of all theadvantage, that the lap carriers remain in the spool after dying and canbe discarded after treatment of the spool yarn. It has been found, thatan appreciable axial stability is obtainable. It has been found further,that depending upon the form of the stays an appreciably greatercompressibility is obtainable, as it was possible with the knownstructures.

In the production of the lap carrier, rendered integrally by the presentinvention, of suitable synthetic material, the selection of the materialcan take place without difficulties such, that the lap carrier remainsduring a hotdying process in its compressed state provided therefor,thus does not expand again in axial direction upon removal of the axialpressure, an expedient which can be of appreciable advantage for thelater unwinding of the yarn over head.

It is still another object of the present invention to provide a lapcarrier resiliently compressible in axial direction wherein thestability of the lap carrier against axial buckling is appreciablyincreased by directing the narrow edges of the stays to the surfacearea. This reduces also appreciably the friction between the inner yarnlayers of the axial bore of the yarn spool during compression.

It is yet another object of the present invention to provide a lapcarrier resiliently compressible in axial direction which comprisesintermediate rings concentrically disposed relative to each other andarranged above each other, which intermediate rings are connected toeach other by means of the stays, in order to provide a furtheradvantageous structure which enhances the inner stability.

It is also an object of the present invention to provide a lap carrierresiliently compressible in axial direction, wherein the stays havebuckling-bending points, in order to bring about the advantage of anextensive localization of the elastic bending of the stays.

It is a further object of the present invention to provide a lap carrierresiliently compressible in axial direction, wherein the bending zone isformed by annularly closed stays with part-sections, depending upon thecharacter of the yarn forming the ball.

It is a still further object of the present invention to provide a lapcarrier resiliently compressible in axial direction, wherein the stayscomprise frames of approxi mate U-shape which are connected withsections of the lap carrier rings, whereby the sections point outwardlyfrom the frame ends.

It is yet another object of the present invention to provide a lapcarrier resiliently compressible in axial direction, wherein the staysare of S-shape.

It is yet a further object of the present invention to provide a lapcarrier resiliently compressible in axial direction, wherein the stayshave predetermined bending cross-sections and bending cross-sectionsobtained by portions of lesser material thickness, respectively.

It is, however, also an object of the present invention to provide a lapcarrier resiliently compressible in axial direction, wherein in theproduction of such lap carriers in integral form, for instance, in amolding-injection process of synthetic material, the suflicient axialbuckling stability can be obtained most extensively without regard tothe use of working material, by connecting together the apex zones ofthe individual stays of the integrally injected lap carrier, which apexzones are disposed in the same cross-sectional plane, with astabilization ring formed to and of the same material as that of the lapcarrier.

The relatively low load of the stabilization ring, in particular therelatively low cross load thereof, permits in an advantageous manner, inaccordance with the present invention, that the stabilization ringconnecting the apex zones of the V-shaped stays jumps back relative tothe outer edge of the stays defining the surface area and has a thinnedcross-section relative to the end rings and the intermediate rings. Thissolution is not only technically favorable, but contributes also to amerely slightly increased material requirement.

It is, however, a still further object of the present invention. toprovide a lap carrier resiliently compressible in axial direction,wherein the inner face of the stabilization ring is flush with the inneredge of the stays and with the inner edges of the end and intermediaterings.

It is yet a still further object of the present invention to provide alap carrier resiliently compressible in axial direction, wherein thewidth area of each pair of adjacent stays disposed in the samecross-sectional plane is directed alternately radially and inclined tothe radial direction.

With these and other objects in view which will become apparent in thefollowing detailed description, the present invention will be clearlyunderstood in connection with the accompanying drawings, in which:

FIGURE 1 is an elevation of a first embodiment of the lap carrierdesigned in accordance with the present invention;

FIG. 2 is a top plan view thereof;

FIG. 3 is an elevation of a second embodiment of the lap carrier, shownpartly in expanded position and partly in compressed position;

FIG. 4 is a top plan view of the lap carrier disclosed in FIG. 3;

FIG. 5 is an elevation of a third embodiment of the lap carrier, partlybroken away for a better demonstration;

FIG. 6 is a top plan view of the lap carrier disclosed in FIG. 5;

FIG. 7 is an elevation of a fourth embodiment of the lap carrier, partlybroken away for the purpose of better demonstration;

FIG. 8 is a top plan view of the lap carrier disclosed in FIG. 7;

FIG. 9 is an elevation of a fifth embodiment of the lap carrier, partlybroken away for the purpose of better demonstration;

FIG. 10 is a top plan view of the lap carrier disclosed in FIG. 9;

FIG. 11 is an elevation of a sixth embodiment of the lap carrier, partlybroken away for the purpose of better demonstration;

FIG. 12 is a top plan view of the lap carrier disclosed in FIG. 11;

FIG. 13 is a side elevation of the lap carrier disclosed in FIGS. 11 and12, partly broken away for the purpose of better demonstration; andshown in expanded position;

FIG. 14 is a side elevation of the lap carrier similar to that shown inFIG. 13, but shown now in compressed position;

FIG. 15 is a section, along the lines 15-15, of FIG. 13; and

FIG. 16 is a part section, along the lines 16-16 of FIG. 13.

Referring now to the drawings, and in particular to FIGS. 1 and 2, thelap carrier, designed in accordance with the present invention comprisesend rings 1 and 2. Carrier elements in form of elastically bendablestays 3 extend between the end rings 1 and 2. The stays 3 are integrallyformed with the end rings 1 and Z and are supported in the median rangeby an intermediate ring 4.

The stays 3 have longitudinal sections 3' and 3" disposed inclined tothe longitudinal axis xx of the lap carrier. Buckling-bending points 5are provided between the sections 3 and 3".

The stays 3 are equally distributed along the periphery of the lapcarrier. The opening angles a defined between the sections 3 and 3"point into the same peripheral direction.

The narrow faces 3" of the stays 3 point outwardly, thus towards thesurface area of the lap carrier.

Referring now again to the drawings, and in particular to FIGS. 3 and 4,the lap carrier is designed in a manner similar to the embodimentdisclosed in FIGS. 1 and 2, but a plurality of intermediate rings 4' areprovided. The stays 6 extend between each pair of adjacent intermediaterings 6 and the respective end rings 1 and 2, respectively, and compriseagain elastically bendable material. They form between each pair ofadjacent rings merely one buckling point 7. The sections 6 and 6",extending from the buckling point 7 in the same direction define theangle 6 therebetween. These formed open angles ,8 point alternatelybetween each pair of adjacent stays 6 in opposite directions. The narrowedges 6 of the stays 6 point again towards the surface area of the lapcarrier.

Referring now again to the drawing and in particular to FIGS. 5 and 6 ofthe drawings, the lap carrier of this embodiment has again end rings 1and 2 and ring like closed stays 8. The part-sections 8' and 8" formthereby substantially the bending places. Again a plurality ofintermediate rings 4' are provided and as stated before, the end rings 1and 2. The stays 8 disposed between the rings 1 and 4' are disposed setoff to the stays 8 arranged therebelow between two intermediate rings 4etc. The narrow edges 8 of the stays 8 point again towards the surfacearea of the lap carrier.

Referring now to the embodiment disclosed in FIGS. 7 and 8, the stays 9of the lap carrier are of S-shape. The end sections of these S-shapedstays, which are disposed about parallel to each other, sit on theintermediate rings 4' and the end rings 1 and 2, respectively. Thepart-sections 9 and 9", extending inclined to the longitudinal axis xxof the lap carrier, permit the elastic bending of the stays 9. Thenarrow edges 9" of the stays 9 point towards the surface area of the lapcarrier.

Referring now to the embodiment disclosed in FIGS. 9 and 10, the stays10 of the lap carrier comprise about U-shaped frames. The part sections10 and 10'', extending inclined to the longitudinal axis x-x of the laprial strength. This prevents, that, primarily in the starting.

ranges of the compression of the lap carrier, yarn layers enter thesplit 23 and are clamped in those ranges. The narrow edges of theframe-like stays 11} point towards the surface area of the lap carrier.

Referring now to FIGS. 11 and 12 of the drawings, the embodimentdisclosed therein is similar to that of FIGS. 9 and 10, but the materialsections 11 and 12' are wider, so that practically the entire stabilizedframe ends 13 and 14' are connected with the intermediate rings 4' andthe end rings 1 and 2, respectively, in a stabilizing manner.

Referring now to FIGS. 13 to 16 of the drawings, wherein the entire lapcarrier is produced integrally of suitable material in an injectionmolding process for synthetic material, the stays 15 are of V-shape. Theends of the V-legs 15' and 15" extend over light material enlargements16 to the rings 4 as well as 1 and 2, respectively.

The apex zones 17 of all stays 15 disposed in the same cross-sectionalplane are connected with each other by means of a stabilization ring 18formed integrally therewith.

The inner face 18 of the stabilization ring 18 has a thinnedcross-section relative to the end rings 1 and 2 and also relative to theintermediate rings 4. It is set off inwardly relative to the outernarrow edge 21 of the stays 15 defining the surface area for the lengthy and is flush with the inner edge of the stays and with the inner edgesof the end and intermediate rings.

The wide face 22 of each pair of adjacent stays 15 is alternatelydirected in radial direction R of the lap carrier and inclined to theradial direction R in the adjacent stay 15, which inclination to theradial direction R results in an arrangement in which the wide face 22of each second stay 15 disposed in the same cross-sectional plane, isdirected along the line L which crosses the radial direction R at anangle 6.

We claim:

1. A lap carrier resiliently compressible in axial direction anddefining a surface area, comprising end rings,

at least one intermediate ring,

a plurality of carrier elements disposed between said end rings,

said carrier elements comprise elastically bendable stays equallydistributed along the periphery of said lap carrier and being inclinedfor at least a part of their length to the longitudinal axis of the lapcarrier,

5 said stays having outer edges oriented toward the surface area of saidlap carrier, and

said stays being rigidly secured to said rings.

2. The lap carrier, as set forth in claim 1, wherein said outer edges ofsaid stays constitute narrow edges.

3. The lap carrier, as set forth in claim 1, which includes a pluralityof superposed intermediate rings disposed concentrically relative toeach other and connected together by said stays.

4. The lap carrier, as set forth in claim 1, wherein each of said stayshas a buckling-bending point.

5. The lap carrier, as set forth in claim 1, wherein said stays compriseclosed ring and define part-sections which define a bending zone.

6. The lap carrier, as set forth in claim 1, wherein said stays are ofS-shape.

7. The lap carrier, as set forth in claim 1, wherein said stays compriseU-shaped frames which have sections directed outwardly from the ends ofsaid frames and are connected with said rings.

8. The lap carrier, as set forth in claim 1, wherein said stays haveapex zones and which includes a stabilization ring of substantially thesame material as that of said stays and connecting said apex zones ofall said stays disposed in the same cross-sectional plane.

9. The lap carrier, as set forth in claim 8, wherein said stays are ofV-shape,

the outer narrow edges of said stays defines the outer surface area, and

said stabilization ring is set off inwardly relative to said outernarrow edge of said stays and has a thinned cross-section relative tosaid rings,

10. The lap carrier, as set forth in claim 8, wherein the inner face ofsaid stabilization ring is flush with the 40 inner face of said staysand with the inner face of said rings.

11. The lap carrier, as set forth in claim 1, wherein each of said stayshas a wide face, and the wide faces of each pair of adjacent staysdisposed in the same cross-sectional plane is directed alternatelyradially and inclined to the radial direction, respectively.

References Cited UNITED STATES PATENTS 2,818,222 12/1957 Scholl242-118.11 2,844,333 7/1958 Davidson 242-11811 GEORGE F. MAUTZ, PrimaryExaminer UNITED STATES PATENT OFFICE (.IER'FIPHTAIEC (H CORRECTIONPatent fin. 3, 98 Dated Segtember 9, 1969 Inventorhfl RD TIGGES andWALTER HENNING In the heading of the patent specification, lines 5 and6,

for "Cronenberg, Germany, and Walter Henning, 5113 Haomann-Lonssh 1,Hoengen, Germany" read Cronenbe rg, Germany, and Walter Henning, Hermann-Lbnestr. 1, 5113 Hoengen, Germany Signed and sealed this 4th dayof August 9 70.

Atteat:

IHEDIAK E. 'SGPRJYIIER, JR. mm Fletch commissioner of Patents AttestingOfficer

